--- product_id: 13589748 title: "4X90F84315 ThinkPad Ethernet Extension Cable, Black" brand: "lenovo" price: "95 zł" currency: PLN in_stock: true reviews_count: 13 category: "Lenovo" url: https://www.desertcart.pl/products/13589748-4x90f84315-thinkpad-ethernet-extension-cable-black store_origin: PL region: Poland --- # 1 Gbps Ethernet speed Plug & play, no drivers needed Compact 80mm cable length 4X90F84315 ThinkPad Ethernet Extension Cable, Black **Brand:** lenovo **Price:** 95 zł **Availability:** ✅ In Stock ## Summary > 🔗 Stay connected, stay ahead — the ThinkPad Ethernet extension that means business. ## Quick Answers - **What is this?** 4X90F84315 ThinkPad Ethernet Extension Cable, Black by lenovo - **How much does it cost?** 95 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/13589748-4x90f84315-thinkpad-ethernet-extension-cable-black) ## Best For - lenovo enthusiasts ## Why This Product - Trusted lenovo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Ultra-Portable Design:** Compact 80mm length fits perfectly in your laptop bag—networking on the go. - • **Effortless Plug & Play:** No drivers, no hassle—just connect and get online instantly. - • **Supports PXE Boot & vPro:** Advanced features for IT pros and remote management, future-proof your setup. - • **Native ThinkPad Compatibility:** Specifically engineered for ThinkPad X1 Carbon & Yoga series for flawless integration. - • **Seamless Gigabit Connectivity:** Experience blazing 1 Gbps wired network speeds for uninterrupted productivity. ## Overview The Lenovo 4X90F84315 ThinkPad Ethernet Extension Cable is a compact, plug-and-play adapter designed exclusively for select ThinkPad models including X1 Carbon and Yoga series. Delivering reliable 1 Gbps wired connectivity with support for PXE boot and vPro, it ensures seamless network access without driver installation. Its small form factor and Lenovo-certified build make it the essential accessory for professionals demanding stable, high-speed Ethernet on the move. ## Description ThinkPad Ethernet extension cable is the unique Ethernet cable for ThinkPad X1 Carbon, to enable Ethernet connection, support PXE and vPro. With small form factor and 80mm cable length, easy to take and portable. No need drive, plug and use. This cable is fully qualified on ThinkPad X1 Carbon. Review: Works with Lenovo X380 Yoga. Make sure you have the right port on your laptop - This adapter works great with the Lenovo X380 Yoga. It connects at 1 Gbps without issue. It was ready to go out of the box, with Windows 10, without any extra drivers. There seems to be a lot of confusion about the type of port that is needed for this dongle. I don't know if it's proprietary to Lenovo, but I've never seen this type of connector before. The owners manual calls this "Mini Ethernet connector" Note: This will not fit any USB port (including USB-C, there's a different adapter for that). This will not fit a mini-display port, nor will it fit a micro HDMI port (even though they are about the same size). The port this will fit has the same logo you see in the picture, which is actually the IT symbol for LAN (three squares connected to a horizontal line) Review: Works fine - I was using ThinkPad dock but got horrible network performance (I had the original cable that came with the device but wanted to leave it at home and use the dock at work) Got this cable and stopped using the dock network and network performance improved dramatically, still next time I think I'll look for device with regular RJ-45 network socket and not propriety one.. ## Features - Designed For: ThinkPad L380; L380 Yoga; X1 Carbon (2nd Gen) 20A7, 20A8; X1 Carbon (3rd Gen) 20BS, 20BT; X1 Extreme (2nd Gen) 20QV, 20QW; X380 Yoga; ThinkPad Yoga 370 - Small form factor, easy to take - Support PXE boot and vPro for ThinkPad X1 Carbon - Enable Ethernet connection for ThinkPad X1 Carbon ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00LPRQ5UG | | Best Sellers Rank | #2,541 in Audio & Video Connectors & Adapters | | Brand | Lenovo | | Color | black | | Compatible Devices | Desktop | | Customer Reviews | 4.5 4.5 out of 5 stars (844) | | Data Link Protocol | Ethernet | | Data Transfer Rate | 5 Gigabits Per Second | | Global Trade Identification Number | 00888772458034, 04053162512672 | | Hardware Interface | Ethernet | | Item Part Number | 4X90F84315 | | Item Weight | 15 Grams | | Manufacturer | Lenovo | | Mfr Part Number | 4X90F84315 | | Model Number | 4X90F84315 | | UPC | 888772458034 065030855259 | | Unit Count | 1 Count | ## Product Details - **Brand:** Lenovo - **Color:** black - **Compatible Devices:** Desktop - **Data Link Protocol:** Ethernet - **Data Transfer Rate:** 5 Gigabits Per Second - **Global Trade Identification Number:** 00888772458034, 04053162512672 - **Hardware Interface:** Ethernet - **Item Weight:** 15 Grams - **Manufacturer:** Lenovo - **UPC:** 888772458034 065030855259 ## Images ![4X90F84315 ThinkPad Ethernet Extension Cable, Black - Image 1](https://m.media-amazon.com/images/I/51ww3nssGuL.jpg) ## Questions & Answers **Q: Will this work with the new 6th X1 Carbon?** A: It will absolutely NOT work. The 6th Gen Carbon X1 requires this: ThinkPad Ethernet Extension Adapter Gen 2 Part Number: 4X90Q84427 Lenovo has redesigned the port, and older adapters will not fit. Unfortunately, Lenovo does not have them in stock, and other sites, namely CDW, are price gauging. CDW wants $39.00 for it. Lenovo's list price is $29.99. They don't know when the part will be readily available (and thus readily available on Amazon). They are not sure why there is such shortage of these adapters. It's probably due to how new the X1 Carbon Gen 6 is. **Q: How is this better than a standard usb-c ethernet adapter?** A: It is made for the proprietary port on the Lenovo ThinkPad X1 Carbon so you would not need to tie up a USB port for the standard USB to ethernet adapter. **Q: Is it compatible with X1 Carbon 5th generation model 2017?** A: Yes, I have used this on a 5th gen - the connector is the same. **Q: will this work on my Carbon X. I had the adapter but lost it...previously i bought the 04X6435. The connectors look the same but I am not sure.** A: This is specifically for Thinkpad X1 Carbon. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works with Lenovo X380 Yoga. Make sure you have the right port on your laptop *by D***P on August 20, 2018* This adapter works great with the Lenovo X380 Yoga. It connects at 1 Gbps without issue. It was ready to go out of the box, with Windows 10, without any extra drivers. There seems to be a lot of confusion about the type of port that is needed for this dongle. I don't know if it's proprietary to Lenovo, but I've never seen this type of connector before. The owners manual calls this "Mini Ethernet connector" Note: This will not fit any USB port (including USB-C, there's a different adapter for that). This will not fit a mini-display port, nor will it fit a micro HDMI port (even though they are about the same size). The port this will fit has the same logo you see in the picture, which is actually the IT symbol for LAN (three squares connected to a horizontal line) ### ⭐⭐⭐⭐⭐ Works fine *by A***V on December 29, 2019* I was using ThinkPad dock but got horrible network performance (I had the original cable that came with the device but wanted to leave it at home and use the dock at work) Got this cable and stopped using the dock network and network performance improved dramatically, still next time I think I'll look for device with regular RJ-45 network socket and not propriety one.. ### ⭐⭐⭐⭐⭐ Works great on my Lenovo Thinkpad X1 Extreme *by D***T on August 22, 2019* This dongle does the job of connecting my laptop to my network through a wired connection. It fits my Thinkpad perfectly. The strange part being I had to get this part through Amazon. When I tried to order it through Lenovo, they sent me the wrong part, which I returned. They were never able to supply the correct part. I ended up doing a Google to find the correct part number and then found it on Amazon. ## Frequently Bought Together - Lenovo 4X90F84315 ThinkPad Ethernet Extension Cable, Black - Lenovo ThinkPad USB3.0 to Ethernet Adapter --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/13589748-4x90f84315-thinkpad-ethernet-extension-cable-black](https://www.desertcart.pl/products/13589748-4x90f84315-thinkpad-ethernet-extension-cable-black) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-30*